Register grille



Sept 6, 1932- J. l.. WATERBURY 1,875,684

REGISTER GRILLE Filed Nov. 23, 1929 BY A TTORNEY.

Patented Sept. 6, 1932 .Timms L. WATERBUBY,

OF SPRINGFIELD, OHIO REGISTER GRILLE Application led'November 23, 1929. Serial No. 409,376.

The present invention relates to improve-v ments in register grilles and has for an .objective to provide a grille unit of economical construction and unusual strength, one'that may be successfully employed with either a power driven fan or with a gravity system lof air circulation and one that olfersa minimum of resistance to the iow of air passing in either direction through the openings of the grille. 1

A further object of this invention is to provide, a grille unit which may be associated in close relation to a power driven fan, offering a protective means against injury of persons from the fan blades and in such a position. that it prevents counter air currents from entering the` fan in opposing direction Vto the fan delivery of air. i

Another object of this invention isto economically furnish a means of supplying a flush plate for an outlet box associated with the grille unit With the foregoing and other objects in view, which will readily suggest themselves to those skilled in theart, the invention consists in the constructions, combinations and arrangements of parts hereinafter described In the drawing, in which like reference characters denote like parts vthroughout the several Views: V ,f

Figure 1 is a fragmentary front elevation of the present invention.

Figure 2 is a side elevation partly in vertical section. A l Figures 3 and`4; areenlarged" partial verl tical sections on the lines 3`3 and 1Q-4 re spectively of Figure 1. Y y

Figure 5 is an enlarged partial vertical section on the lineV5-5 of Figure 1, the scale beingenlarged over views in Figures 3 and 4. Figure 6 is a partial vertical section showing a preferred method of motor mounting, this view being a continuation of: Figure 2. Figure 7 is an enlarged partial horizontal v section on line 7-7 of Figure 1.

Referring moreV particularly to the drawing, 7 and 8 designate two conventional steel grilles such as are commonly used in hotrair installations.

InFigure l, 10 is a'large' circular opening in reinforcing plate 9 to allow air driven by fan 11 to pass through the openings of grille plates 7 and 8 and through plate 9 as shown 1n Figure 2.., The grille plates 7 and 8 are secured to the plate 9 preferably by spot 55 welding.` y 4 l In Figure 2, 12 is a motor in close Y l proximity to the grilleunit rotatingmotor shaft 13 andfan 11 in either a clockwise or in an anti-clockwise direction; AFan v11 ispar- .60

tially housed4 within a4 circular collar 14' which is secured to the grille plate 8 by spot welding,causing all air entering fan 11 when driven in anti-clockwise direction to be and 8 within opening 10 to the exclusion of vair that might 'otherwise enterthe fan from themotor side of therfrrille unit. l Y K Screen 15 shown in li'igure 1",`is securedto the inner surfacesof the grille plates 7 and `8 70 andto the reinforcing plate'9. 1'6 is a rectangular border frame to which grille plates 7 land 8 and intermediate lplate 9 Vare attached by means of four screws l 2O secured through tappedV holes v 18 in four right angle metal ianges` 17, spot welded to border frame 16 as shown inFigures l and 3. `19 is the border frameof grille plate 7. p In Figures 1,` 5, and 7, 21 is a switch secured to, plate 9 in conventional manner. Four` screws 22 secure air outlety box 23 to the plate `9, plate 9 serving as its flush plate. Lamp 2,4: and lamp socket 25 and plug-in re'- ceptacle 26 are secured to outlet box 23.` v27 in Figures 5 and 7 is a pilot light jewel se-y S5 cured by fiange28to plate 9. In Figure 4c, 29 and 30 are Grille bars of the grille plates 7 and Srespectively showing how the -convex'and concave surfaces of the grille bars are. positioned so that air passing through the grille plate openings in either direction passes over stream line surfaces andv how .counter currents of air are elimi-` nated 4that otherwise would develop if the concave surfaces of the grille bars of grille plate 7 were exposed to the direction of the air passing from the fan through the openings vof the grille plate 7.

In Figure A7, 31isan electric line leading toswitch 21 from bindingipos't 32,7on plug- 100 in receptacle 26. 33 is an electrical line leading from switch 21 to binding post 34 on lamp socket 25. 35 n Figure 5 is an electrical line leading from binding post 34 to motor l2. 36 is an electrical line leading from binding post 37 to motor 12. 38 is an electrical line leading from binding post 37 in Figure 7 to binding posty 3,9, on plug-in receptacle 26.

Screen 15 in Figure 1 affords personal protection against injury from fan blades of fan 11. In the operation of the device electrical current from the house line when switch is closed enters plug-in receptacle 26, lighting lamp 24 and operating motor 12. 'VIhe light of lamp 24 is diusedby pilot jewel 27 indicating that the motor is in operation.V When the motor is rotating the fan in anti-clockwise direction, `air passes throughV thegrille Within circle 10, toward fanll, while plate 9 and collar 14 prevent air from entering blades of fan 11 other than from the front side of the grille plate L7. Wvhen fan is rotated in clockwise, direction by` motor 12 the direction of air is limited 1 plate 9 and collar 14 to flow toward fan 11 to flow in the fan delivery direction only.

' Plate 9 strengthens and assists in holding grille plates 7 and 8 in alignment. Collar 414 assists in like manner. Plate 9 therefore, combines to aiford an economical means for strengthening and holding in alignment the.

grille unit at the same time acts as ak baffle plate to prevent counter currents of air. It

` and 8 to bow inwardly toward the inner side of each grille plate is corrected in the straightening processA when the two grille ,f platesare spot welded together or otherwise `secured on their inner surfaces. The grille unit is thereby thoroughly reinforced. VIt .is ofeconomical construction4 and offers the minimum of resistance to air when passing in either direction through the openings of the grille unit. s

`Screen 15 affords a simple built in ,feature of the grille unit.

It is obvious that various changes and modifications may be made in details of `construction and design of theV above specifically described embodiment oflthis invention withoutV departing from the spirit thereof, such changes and modications being restricted only by the scope'of the following claims y What is claimed isz- Y t 1. Inkr a structure of the character described, the combination of two grilles placed f together, and anY intermediate supporting ving being of smaller dimensions than said grilles, and a screen within said opening.

3. In a structure' of the character described, the combination oftwo grille plates having s imilarlyformed grille bars, each bar having Yone side thereof .formed of a rounded surface, aninterm'ediate 'supporting plate for said grille plates and having a circular opening of smaller dimensions thanv the grille plates but being otherwise closed to the pas# Y sage ofair, saidgrille plates and intermediate plate being secured together withthegrille plates baclrto back and the bars thereof vin registry .with each other. t

4.l In a structure of the character def scribed, the combination of two grille plates having similarly formed grille bars, each bar having one side thereof formed of a rounded surface, an intermediate supporting plateito support said grille plates and havingy a circular opening of smaller dimensions than the grillegplates butfbeing otherwiseclosed to lthe passage of air, said grille plates and intermediate plate being secured together with the grille plates back to back and thebars thereof in registryr withk eachother and a screen extending over said opening. i

, 5.. In a1stru`cture of the character described, the-combination of two. grille plates, anA intermediate V,supporting platey fory supportingsaid grille plates, said ,grille plates c beingplaced on oppositesidesof said sup-v porting` plate, said supporting plate having a central opening for-the circulation of air through said grilles but being otherwise imperforate,said opening being of smaller dimensions than said grilles, a fan in line with said central opening, and an open ended casi ing surrounding saidfan of substantially the same diameter as theropening in said supporting plate.- y f 6. In a) structure of theV character(l described, a supporting plate, a grill-e plate on each side of said supporting` plate and secured theretorso as tobe supported thereby, said supportingplatelhaving an opening, a screen withinsaid opening, said grille plates having similarly formed grille-bars shaped l to an elongated concavo-convex form with the edges of the bars'placed against said supporting plate and screen and in registry with each other. 'Y

c JAMES L. WATERBURY.. 

